Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Do Pitbulls’ Jaws Lock When They Bite? Vet-Verified Facts & FAQ

Blue Nose Pitbull

No, Pitbulls do not lock their jaws when they bite! It’s commonly believed that Pitbulls can lock their jaws when biting down on something. However, this is only a myth. Lockjaw is a rare condition caused by tetanus bacteria that prevents a dog from either opening or closing their mouth.

In this post, we dive deeper into how this myth originated and general facts about the Pitbull bite.

divider dog paws 3 oct 2024

The Lockjaw Myth: Where Did It Originate?

The myth that a Pitbull can lock their jaw when biting something stems from the bias that the breed is more vicious than other breeds. The Pitbull is indeed one of the stronger, more muscular dogs. Their strength is one of the reasons that people have abused them for bloodbath sports.

Even so, Pitbulls are just as gentle as they are strong.

The only thing that can cause a Pitbull to experience lockjaw is a tetanus infection.1 So, if a dog has lockjaw, it’s not because they’re vicious—they’re simply sick.

American Pitbull Terrier with flowers
Image Credit: Jumpstory

Why Are Pitbulls So Strong?

So, why in the world are Pitbulls more muscular than other breeds?

Genetics and selective breeding have made the Pitbull what they are today. All bull-type terrier dogs trace their ancestry back to the Bulldog of 200 years ago. This type of dog was much fiercer and more brutish than the one we know today.

For centuries in Great Britain, bully breeds (and other dog breeds) were bred specifically for blood sports. These dogs were released to fight a staked bear or bull, and the crowd would bet on the outcome.

Breeders would purposefully create muscular dogs willing to take on any animal, big or small. This strength and hunting desire has been passed down to all the bully breeds. However, this doesn’t make the Pitbull any less loving or gentle. It just means they’ve had a troubled past.

Several dog breeds throughout history have fought for blood and have found their place in families. But due to the Pitbull’s strength, improper management, and continued abuse, some laws have forbidden the breed in certain areas.2

Just How Strong Is a Pitbull’s Bite?

Measuring a dog’s bite force is quite a challenge, so it’s difficult to produce accurate results. Scientists have determined that the larger the dog and head and the wider the jaw, the higher the bite force.3

After careful calculation, scientists have estimated that the average Pitbull’s bite force measures around 242 PSI. Does this make them the strongest dog with the worst bite? Not even close.

The dog breed with the strongest bite is a Turkish breed called the Kangal. The bite force measure is commonly said to be 743 PSI. However, the true source of this information is hard to pinpoint. We can estimate it to be closer to somewhere between 250 and 400 PSI. To put this into comparison, a lion has a bite force of 650 PSI.

Blue Nose Pitbull Closeup
Image Credit: Diego Thomazini, Shutterstock

Getting Your Pitbull to Release Their Bite

You shouldn’t interfere with a dog fight because you could walk away with serious injuries. But in the moment, you likely want to try your best to prevent as much damage as possible.

The best way to release your Pitbull’s bite is by training your dog to release it on command.

In more serious circumstances, a blow horn can scare your dog or another dog trying to start a fight. It can also signal to someone for help.

divider dog paws 3 oct 2024

Summing Up

Pitbulls have had a rough past. Their strength has been abused for years, and unfortunately, the bias still prevails. But that doesn’t mean they can do things with their jaws that other dogs can’t.

With the help of science, we’ve learned they don’t come close to having the strongest bite force. This means Pitbulls are (and always were) loving, gentle creatures with a high prey drive. They’re really no different from any other dog.

See Also:


Featured Image Credit: Diego Thomazini, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

How to Groom a Poodle: 6 Simple Steps

Poodles are fun-loving, active, and social dogs that tend to do their fair share of adventuring whenever they have the opportunity. Poodles are...

6 Best Dog Breeds for Hiking: Info, Temperament & Pro Tips

Hiking is a wonderful outdoor activity that benefits not only us but also our furry friends. Dogs love exploring the great outdoors, and...

20 Best Dog Breeds for Teenagers & Reasons Why (With Info & Pictures)

We all have that classic image in our heads of a boy growing up and getting through those often traumatic teen years with...

BHA & BHT: Dog Food Ingredients to Avoid

You would be forgiven for thinking that dog food manufacturers would only use high-quality and healthy ingredients in their dog food. After all,...

More related

8 Confidence-Building Games for Dogs: Vet-Approved Activities

If you’ve noticed your dog becoming anxious around other people, sticking close by you wherever you go, or becoming uncomfortable in certain situations,...

10 DIY Dog Feeders You Can Make Today (With Pictures)

Dog feeders can be helpful for your dog and for you. With a setup for your dog’s food, you’re far less likely to...

8 Off-Leash Dog Parks in Chesterfield, MO You Can Visit in 2026

If you live in an apartment in the city or you don’t have a yard, dog parks offer an opportunity to exercise your...

13 Signs Your Dog Is Stressed, Depressed, or Sad (Vet Answer)

Just like people, dogs have rich interior lives and are capable of experiencing a wide range of emotions, both positive and negative. Dogs...

Keep reading

8 Best Human-Grade Dog Foods in 2026: Reviews & Top Picks

“Human-grade” dog food is a loose term that can be a bit confusing. According to the Association of American Feed Control Officials (AAFCO), this means that all the ingredients are edible for humans.1 Essentially, this label on a dog food...

cream dog eating from the bowl

How Much Does a Cavalier King Charles Spaniel Eat in a Day? Our Vet Explains

The Cavalier King Charles Spaniel is a toy dog breed that’s among the most popular dog breeds kept as pets today. Ranking at #14 according to the American Kennel Club’s (AKC) popularity ranking for 2023, it’s evident that these charming...

cavalier king charles spaniel eating bone treat

Are Plastic Bowls or Containers Bad for Dog Food? Vet-Approved Guide

Plastic is in the limelight—raising many concerns. As the pet market grows, so does the controversy about using certain products. But with so many plastic dog food packaging and food bowls still dominating the market, are they really so bad?...

poodle dog eating

Can Dogs Eat Rotisserie Chicken? Vet-Approved Benefits, Risks, & FAQ

Who can resist the mouthwatering aroma of a perfectly cooked rotisserie chicken? Whether it’s a family gathering, a summer picnic, or a quick and convenient dinner option, rotisserie chicken has become a popular choice for many. But what about our...

Can Dogs Eat_Rotisserie Chicken

11 Best Large Breed Dog Foods in 2026 – Reviews & Top Picks

Large breed dogs need different nutrition than other breeds out there. They require more joint-supporting supplements, for instance, because their joints carry much more weight. Most large-breed dog foods are designed specifically to counteract these issues. However, this isn’t always...

labrador eating outside

Can I Buy Dog Food Using Food Stamps (SNAP)? 2026 Guide

As the economy continues to struggle, many families are finding it difficult to make ends meet. One way that some people are able to save money is by shopping for groceries using food stamps. However, is it possible to buy...

woman buying dog food

Rachael Ray Dog Food Review 2026: Recalls, Pros & Cons

Review Summary Celebrity chef Rachael Ray has created a line of dog foods that feature some of her best recipes. This is a line of all-natural dog food that is considered to be high-quality and full of ingredients that can...

Dogster_Rachael Ray Dog Food Review

Thanksgiving Food for Dogs: Safe Options & What to Avoid (Vet Verified)

Thanksgiving is an important holiday for many families and friends in various countries. Since we count our dogs as members of our families, it’s only natural that we want to include them on this special day. For most families, Thanksgiving...

family-with-dog-celebrating-thanksgiving